The first find of a melt inclusion in diamond from the Mir pipe

Using the sequential-grinding method of Bulanova et al. (1986), designed for the gradual uncovering of diamond inclusions, deep-lying inclusions (including a central partly crystallized melt inclusion, six zonally distributed omphacites, and two pyrope-almandines) were brought to the surface in single-crystal diamond and analyzed using an energy spectrometer. The melt inclusion was found to consist of four phases: the rutile phase, the clinopyroxene phase, the K-Al-Si phase, and the Fe-Ti-Si phase. It is suggested that the melt inclusion is a fragment of a primary melt of rutilic eclogite.